Heya, have not been here for a while ( think the last time I played was after the defiler was introduced). Level 60 Cleric on Greibeyr (or whatever it's called).

Anyway, logged in and saw some stuff that I had questions about:

I see there was a change to the costume system, seems like it's a separate entity and they mailed back all the costume gear. Is it safe to sell those? Because I don't want to lose my Christmas hat.

Nowadays, once an item is in your bags, it's considered collected for wardrobe purposes. So you can trash/vend/sell whatever you've collected. Many guilds now have a wardrobe vault. You borrow an item and return it. It's now in your wardrobe collection. (That goes for weapons too. The skin(s) are collected.

Originally Posted by Eughe

The new classes, do we have to buy them from the cashshop?

Yes. Of course, you can play without them but depending on what class your playing it adds more options/choices.

Originally Posted by Eughe

Are there expansions that I need to get? I see an ascension pack, would that put me up to date on everything?

No. The game is open to endgame. Of course, you'll have to level to get there. The Ascended Essentials Pack with getting you all the souls that are available.
But it's not required.